Recommended daily intake= 20 mcg

1. Mushrooms, white, raw (the only source)
   Contain: 18 IU
   %DV: 5 %

Deficiency symptoms

1. lower respiratory tract infections
   https://www.ncbi.nlm.nih.gov/pubmed/27178217
2. Fatigue
   https://www.ncbi.nlm.nih.gov/pubmed/26543719
3. Obesity
   https://www.ncbi.nlm.nih.gov/pubmed/21206551
4. low back pain
   https://www.ncbi.nlm.nih.gov/pubmed/26431139
5. late-life depression
   https://www.ncbi.nlm.nih.gov/pubmed/26998791

Impaired wound healing
https://www.ncbi.nlm.nih.gov/pubmed/27222384

Function:

1. helps the body absorb calcium
2. normal bone formation
3. Prevent osteoporosis in adults or rickets in children.
   https://medlineplus.gov/ency/article/002405.htm
4. Treatment of Parathyroid hormone deficiency
   https://www.sciencedirect.com/science/article/pii/B9780123919090500451
5. Improvement of myocardial performance in patients with heart failure
   https://www.sciencedirect.com/science/article/pii/B9780128099636000845
6. play role in shaping brain development and ongoing function
   https://www.sciencedirect.com/science/article/pii/B9780123819789100320

Overdose: more than 100 mcg
https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/#h8

Excess: stored in the body’s fatty tissue.

Type: Fat soluble vitamin
https://medlineplus.gov/ency/article/002405.htm

Side effects of hypervitaminosis D:

1. Calcium deposits in soft tissues such as the heart and lungs
2. Confusion and disorientation
3. Damage to the kidneys
4. Kidney stones
5. Nausea, vomiting, constipation
6. poor appetite, weakness, and weight loss
   https://medlineplus.gov/ency/article/002405.htm